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With OCPJP, you are eligible to take the other developer certifications.
Aarohi Rai wrote:Can anyone suggest which exam i must prepare next?
There is no "must". Whatever exam you prepare next is up to you.
Most people would go for web component then business component (EJB/JPA) then web services.
This order is not a must. Why this order? Maybe it's the difficulty (which I doubt). I personally think it's the amount of topics/specifications the exam covers.